Set the bottom handwriting bounds offset on the Url bar to 0

This is to stop the Url bar from intercepting stylus events meant for
the web contents.

Bug: 1427112
Change-Id: I4aa4461d8c422f5091942a9e95d408228aff85ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4365223
Reviewed-by: Richard Coles <torne@chromium.org>
Reviewed-by: Peter Conn <peconn@chromium.org>
Commit-Queue: Alex Mitra <alexmitra@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1122028}

base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java

@@ -336,6 +336,38 @@ public static void setActivityOptionsBackgroundActivityStartMode(
         }
     }
 
+    /**
+     * Sets the bottom handwriting bounds offset of the given view to 0.
+     * See https://crbug.com/1427112
+     * @param view The view on which to set the handwriting bounds.
+     */
+    @OptIn(markerClass = androidx.core.os.BuildCompat.PrereleaseSdkCheck.class)
+    public static void clearHandwritingBoundsOffsetBottom(View view) {
+        // TODO(crbug.com/1427112): Replace uses of this method with direct calls once the API is
+        // available.
+        if (!BuildCompat.isAtLeastU()) return;
+        // Set the bottom handwriting bounds offset to 0 so that the view doesn't intercept
+        // stylus events meant for the web contents.
+        try {
+            // float offsetTop = this.getHandwritingBoundsOffsetTop();
+            float offsetTop =
+                    (float) View.class.getMethod("getHandwritingBoundsOffsetTop").invoke(view);
+            // float offsetLeft = this.getHandwritingBoundsOffsetLeft();
+            float offsetLeft =
+                    (float) View.class.getMethod("getHandwritingBoundsOffsetLeft").invoke(view);
+            // float offsetRight = this.getHandwritingBoundsOffsetRight();
+            float offsetRight =
+                    (float) View.class.getMethod("getHandwritingBoundsOffsetRight").invoke(view);
+            // this.setHandwritingBoundsOffsets(offsetLeft, offsetTop, offsetRight, 0);
+            Method setHandwritingBoundsOffsets = View.class.getMethod("setHandwritingBoundsOffsets",
+                    float.class, float.class, float.class, float.class);
+            setHandwritingBoundsOffsets.invoke(view, offsetLeft, offsetTop, offsetRight, 0);
+        } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException
+                | NullPointerException e) {
+            // Do nothing.
+        }
+    }
+
     // Access this via ContextUtils.getProcessName().
     @SuppressWarnings("PrivateApi")
     static String getProcessName() {

chrome/browser/ui/android/omnibox/java/src/org/chromium/chrome/browser/omnibox/UrlBar.java

@@ -328,6 +328,7 @@ protected void onFocusChanged(boolean focused, int direction, Rect previouslyFoc
     public void onFinishInflate() {
         super.onFinishInflate();
         setPrivateImeOptions(IME_OPTION_RESTRICT_STYLUS_WRITING_AREA);
+        ApiCompatibilityUtils.clearHandwritingBoundsOffsetBottom(this);
     }
 
     /**